Nailing machine



Nov. 28, 1939. HA E. TwoMLEY 2,181,634

NAILING MACHINE Filed July 28, 193? s 'sheets-sheet 1 Nov.'28, 1939. H. EJTWOMLEY v 2,181,634

' NAILING MACHINE Filed July '28, 1937 6 Sheets-Sheet 2 y NOV. 28, 1939. E, TWOMLEY 2,181,634

NAILING MACHINE Filed July 28, 1937 e sheets-sheet s 4mm/fr NOV. 28, 1939. H E, TWOMLEY 2,181,634

I NAILING MACHINE Filed July 28, 1937 6 Sheets-Sheet 4 Nov. 2s, 19.39.` H. E. TWOMLH 2,181,634

NAILING MACHINE Filed July 2a, 1957 6 sheets-sheet 5 37 Wm/me ,affanni/30M Nov. 28;. 1939.

H. E. TWOMLEY NAILING MACHINE Filed July 28, 1937 6 Sheets-Sheet 6 Patented Nov.` 2s, 1939 UNITED STATES PATENT OFFICE NAILING-MACHINE v Herbert E. Twomley, Riverside, Calif., assignor to Food Machinery Corporation, San Jose, Calif., a corporation of Delaware Application July 28, 1937, Serial No. 156,098

18 Claims.

' Thisinvention relates to nailing machines and particularly to novel means for' the feeding of box material to the same.

In the manufacture of boxes, crates andthe like and in lidding the same, nailing machines are provided in which box material must be fed into the machine for the manufacture or lidding of the box. In some cases this material is fed into the late the work to some degree at leastlduring the v manufacture of the box. In many of the latter types of machines it is necessary to feed the box l5 material into` the machine entirely byv hand.

This necessity considerably slows up the manufacture of boxes with the semi-automatic type machine. n 1

It is another object of my invention to provide 3U facture of crates, boxes or the like in which the box material forming the sides and bottom vof the box is automatically fed into the machine. It is a further object of this invention to provide 30 such a nailing machine in which the box material is fed into the machine in such a manner as to allow ample room for the manipulation of the partly completed work by the operator to properly position this in the machine for the performance of the next nailing operation.

It is yet another object of my invention to provide in a nailing machine a means for automatically feeding box material into the machine to form the sides and bottom of the box Where the a bottom of the box is formed of a different number of separatepieces of box material than the sides thereof.

The manner of accomplishing the foregoing objects as well as further objects `and advantages will be made manifest in the following description taken in connection with the accompanying drawings in which:

Fig. 1 is a front elevational View of a preferred embodiment of my invention.

machine by hand and in others by automatic a semi-automatic nailing machine for themanuf Fig. 2 is a side elevation taken in the direction of arrow-2 in Fig. 1.

Fig. 3 is a fragmentary sectional View taken on the line 3--3 of Fig. 2.

Fig. 4 is a fragmentary operation view takenron 5 the line A'l-4 of Fig. 3.

Fig. 5 is an enlarged fragmentary sectional View taken onv line 5-5 of Fig. 1 with the various parts of the machine at rest.

Fig. 6 is a View similar to Fig. 5 and illustrating the machine in the middle of a nail driving stroke. f

Fig. '7 is a view similar to Fig. 6 and illustrates the machine at the completion of a nail driving stroke and in the midst of a Work expelling and slat feeding movement of the slat feeding mechamsm.

Fig. 8 is an enlarged horizontal sectional View taken on line 8 8 of Figs. 1 and 2.

Fig. 9 is a fragmentary detailed sectional view taken on the line`9-9 of Fig. 8

Referring specifically to the drawings, the preferred embodiment of my invention illustrated therein comprises a nailing machine I0 which includes a frame I I, a power mechanism I2, a nailing mechanism I3 and a slat feed mechanism I4.

The frame 11 The frame I I includes a base I8 having secured thereon four standards or upright members lI9 which are tied together at their upper ends by head castings!!! and a cross bar 2 I Mounted rigidly von the'frame base I8, and provided. for various purposes which will be made clear hereinafter, are main crank shaft bearings base I8 is an idler bearing 3 3 and a motor foundation 34. The base- I8 also has pedal shaft bearings 35. Mounted on and extending upwardly from each of the bearings 28 is a lever base bearing 36. vThe base I8 also provides a pair of clutch release arm shaft bearings 31 and 38. (See Figs. 1v and 5.)

shaft 44! which is journalled in bearing 3| and a nail hopper operating crank shaft i5 which is journalled in bearing 32. Journalled in the foot pedal shaft bearings 35 is a foot `pedal shaft 4E while a clutch release arm shaft 41 is journalled in bearings 3l' and 38. (See Figs. 1 and 5.)

Fixed on opposite ends of shaft 4| are nail driving cranks 5l). Between these cranks and the bearings 25 and 26 are provided nail chuck and slat feed mechanism lifting cams 5|. Also fixed on shaft 4| just inwards vfrom bearing 26 is a master gear 52 and inwards from this a clutch operating cam 53 and inwards from this a clutch normalizing arm 5ft. (See Fig. 3.)

Countershaft 'i2 has mounted thereon a pinion gear 5B which meshes with the master gear 52, a pinion gear 6|, a clutch 62, a clutch operating ring 63 and a brake mechanism 64.

The slat feed mechanism operating shaft i3 (Figs. 4 and 5) has mounted thereon a clutch having on the periphery thereof a ring gear which meshes with the pinion gear 6l on shaft 5E. The shaft i3 also has upon it a pinion Si and a drive sprocket 6i?.

On the shaft 40. is mounted a gear 'i2 which meshes with the pinion gear 5i on the shaft 43 and also has a pinion 'i3 which meshes with a gear 'M provided o-n the nail hopper crank shaft 45. On the outer end of'said crank ,sh-aft is provided a crank 15.

Provided on foot pedal shaft it is a foot pedal 'it and a clutch arm il which operatively engages the clutch operating ring 53 or" the clutch (i2. Fixed on the shaft lil is an arm 'i8 having a cam follower roller '19 thereon, the latter being in alignment with the cam 5S. Also fixed on shaft A7 is a clutch release arm gli, (see Figs. 1 and 5) the upper end of this arm lying in the path of rotation of a clutch control nger Si, the latter being provided on the clutch 65 and adapted to control the latter so that when positioned as shown in Fig. 5 this finger throws clutch 65 out but when released from contact with the arm it is yieldably extended into radial position as shown in Fig. 7 thereby throwing into engagement the clutch 65 and connecting the gear 55 with the shaft d3. The arm 'i8 is yieldably supu ported by a spring in the position in which it is shown in Fig. 5..

Pivotally mounted on the idler bearing 33 is an idler arm 8% having an idler roller t? which is puiied inwardly in radial alignment with. the sprocket 58 by a spring 33 for a purpose which will be made clear hereinafter.

The motor 4|! has a pinion sprocket 95 which connects through a chain 9| with a ring sprocket $22 provided on the shell of the clutch 52 and through which this clutch is continuously driven by the moto-r 40.

The waiting mechanism 13 included in this mechanism are four cross head slide track plates which are secured upon inner faces of the corner posts l@ of the machine. (See Figs. 1, 2 and 8.)

Fixed kupon the lower ends of the plates E35 are anvil bases 96 upon which anvils 9i are pivotally mounted on shafts 93 and yieldably urged by springs 99 into positions for supporting side or bottom rails |09 of crate heads Hwhen the latter are inserted into the machine it. Provided on brackets |55 and |56 extending rearwardly from the anvil bases 96 are a shifting shaft it? and a fixed shaft |08. Rigidly fixed on the bracket |55 and extending along the left hand side of the slide blocks H3 and Elfi, the first of which is fixed to theshaft iii? and freely slidable on the shaft |58, and the latter of which is fixed on the shaft 55B and freely slidable on the shaft im. Mounted on the block M3 is a spring pressed crate head flusher i I5, while mounted on the block lili is a similar spring pressed crate head iiusher lit.

Disposed between the bracket |55 and the block H3 is a compression spring The shaft itil extends through the bracket |55 and'has :,f.

nxed to the left hand extremity thereof a pair of expansion members H3 and H9, the first of these being rigidly xed to the shaft lll'i on its extremity, while the latter is disposed between the member H8 and the bracket |65. (See Fig. 8.) These two expansion member-s have complementary bevelled-tooth faces which function when the member |19 is rotated relative to the member H8, to shift the shaft lili and parts affixed thereto in a leftward direction as these are viewed in Fig. 8. The operation of the expansion members |48 and H9 in this manner is accomplished by an arm |21! which is provided on the member lig and which is actuated in a manner which will be made clear hereinafter.

The nailing mechanism also includes a pair of nail chuck crossheads |35 which are slidably guided vertically, front and rea-r portions of these crossheads having a sliding fit with the front edges of the front slide plates 95 and the rear edges of the rear slide plates 95. Each of the crossheads |25 has provided thereupon four groups |26, |21, |28 and 29 of nail chucks |39, these being in alignment and disposed in the order in ywhich they are enumerated from the front towards the rear of the machine. (See Figs. 1, 5, 6. and '7.) The nail chucks |35 are adapted to receive nails, each chuck receiving one nail at a time, and hold these nails in position fordriving downwardly into work supported on the anvils 9i' when said work is positioned on these anvils against thecrate head stop bars H33 and H0.

Disposed between and slidably engaging the adjacent edges of the slide bars 95 on each sid`e of the machine is a nail driver crosshead |35. These crossheads have nail drivers 36 which extend downwardly into the nail chucks it@ and these drivers are caused, by relative vertical movement between the crossheads |35 and |25, to expel nails from the nail chucks |35 in the performing of a nailing operation.

Pivotally mounted on the head castings 2B of the machine is are nail hoppers its and icl which are linked together by tie rod it?. so that rocking of the hopper IM results in a ccrresponding operation of the nail hopper M5. The .nail hoppers Ulli and Ml are associated with nail feed mechanisms |43 which cooperate with the hoppers 1.1i@ and Mi, in a manner well known in the art, to feed nails to the nail chucks 35. The mechanisms |43 feed nails selectively to the chucks |35 as will be described hereinafter.

The various components of the nailing mechanisrn i3 described hereinabove are provided with means for their actuation as followszf Connecting the cranks 50 with the nail driver crossheads r|35 are pitmans |50, .these including yieldable spring compensators |5|. The pitman |50 on the left-hand side of the machine A| has a bolt |52 which lies in a slot |53 formed in the forward end of the arm |20 so that this arm is swung downwardly and upwardly with each reciprocation o1' this pitman 50, the keiiect of this being made ciear hereinafter.

Disposed on each side of the machine I0 and having their rear ends pivotally mounted in bearings 36 arecam follower arms .|56 having pins |51 provided at their ends upon whichare mounted, rollers |58 which rest upon and followr the surfaces of the cams 5| as the shaft 4| rotates. Also mounted on the pins |51 are links |60 which extend upwardly into the machine and have` their upper ends pivotally connected to the chuck crossheads |25 at |25'. (See Figs. 2, 6, 8 and 9.)

Provided on the upper ends of the standards |9 at the right of the machine |0 are bearings |6|, in which is journalled a shaft |62, carrying an arm 1| 63 which is connected by a link |64 to the nail hopper |4| and by pitman |65 to crank 15. (See Figs. 1 and 2.)

Provided on the frame in alignment with heads H when the latter are inserted in the machine are work stops |10 and |1|.

Slat feed mechanism 14` Secured to the inner faces of upper portions of the slide bars 95 of the machine I0 (see Figs. 2

and 9) are brackets |15 which are integral with side walls |16 of a slat magazine |11. The maga. zine |11 also has vertical flanges |18 extending inwardly from the front edges of the side walls |16 and a pair of angle irons |80 adjustably secured thereto by bolts |8| extending through slots |82 in the side walls. The flanges |18 and angle irons |80 form front and rear walls, respectively, for the magazine |11. its opposite ends to lower portions of the flanges |18 is a cross bar |83 and likewiseA connecting lower portions of the side walls |16 is a rear cross bar |84. Secured to the middle of the cross bar |83 and extending downwardly a short l distance therefrom and then horizontally for,- ward is a friction shoe |85, the forward end of which is yieldably held, downwardly by a rod |86, the latter extending upwardly through the bar 2| and having a coil spring |81 which biases it downwardly and nuts |88 by which the vertical position of the front end of the shoe |85`may be adjusted.

Also provided on the cross bar |83', as shown frames 20| providing at their corners bearings 202, 203 and 204 in which are journalled respectively shafts 2'05, 206 and` 201. Each of-these shafts has fixed thereto a pair of sprockets 208 which lie just outside the frames 20| and about which are trained endless-chains 2|0. Provided Secured at onthese chains are three sets 2| 2|2 and 2|3 of dogs'2'l4, the foremost dogs of these sets being equally spaced about the chains 2|0. f

Opposite ends of the shaft205 extend laterally into and are guided by the slots |94 of brackets |93. The opposite ends of the shaft 201 also extend laterally "and are pivotally connected toi rear ends of lever bars 220, the front ends rof these bars being pivoted at 22| on the front pair of corner posts I9. (See Figs. 5, 6 and '1.) Pivotally connected at their opposite ends to arms |56 and to the levers 220 are links 222. Fixed on one end of the shaft 201 is a sprocket 225 which 'is disposed above and in alignment with the slat conveyor drive sprocket 68 (see Figs. 3 and 4). Encircling the sprockets 68 and 225 is a slat conveyor drive chain 226, this chain also being constantly engaged and maintained in taut condition by the idler roller 81.

Operation 'I'he principal operating views are Figs. 5, 6 and 1, the first of which illustrates the machine I0 at rest with the parts disposed as at the b eginning of the manufacture of a crate. It is to be noted that three slats S are resting on the chains 2|0 with the slat conveyor 200 disposed upwardly owing4 to therfact that the cam follower rollers |58 are rresting on the high portions of the cams 5|. These slats S are disposed yjust in front of dogs 2 I4 of the group 2| thereof.

It is also to be noted that these slats are snugly engaged by the dogs 2|4 just tothe rear thereof, this being due to the frictional engagement of the shoe |85 with the upper surfaces of these slats S as the latter were being fed forwardly by the conveyor 200 into the positions in which they are shown at rest in Fig. 5. It is further to be noted that these slats as thus disposed are located at a considerable distance above the nailing anvils 91. Attentiony is also called to the chucks |30 being spaced upwardly from the slats S disposed therebeneath and to the fact that substantial portions of the nail drivers |36 are withdrawn upwardly from the chucks. i

The operator now positions a pair ofl crate heads 'I-I in the machine by pushing these rearwardly between the anvils 91` and the crate head ushers ||5 and ||6, with short edges of these heads horizontal, with the upwardly disposed rails |00 extending laterally over the anvils 91, and with the heads extending rearwardly in contact with stops |10. The anvils 91 of course yield outwardly about the shafts 98 due to the curved surfaces 91 as the heads H are being pushed into the machine and then rock back again into position beneath the rails |00 disposed thereover. (See Fig. 9.) Each of the headsof course is provided with a rail |00 along each of its sides and bottom so that no matter which side of the heads or the bottom thereof is disposed upwardly this has a rail |90 which is adapted to extend over the adjacent anvil 91 as shown in Fig. 9.

It is to be understood that at this time the motor 40-is electrically energized to cause the cone stant rotation of the clutch 62 through the chain 9| which connects the ring gear 92 with the motor pinion 90. As the pinion 6| is fixed tothe clutch 62 and continually rotates therewith, the clutch 65 is also caused to rotate continuously although at a lower rate of speed than clutch 62. The shafts 4|, 42 and 43 are ofcourse stationary so long as the clutches 62 and 65 remain disengaged. i y

Having inserted the heads H, as above indicated, the operator steps on the pedal 16 and immediately removes his foot therefrom. This swings the arm i1 so as to shift the clutch control collar 63 inwardly to engage the clutch 52 and start the shaft 42 rotating with said clutch. This transmits rotation through the pinion 55 and gear 52 to the crank shaft 4| and causes exactly one revolution of this shaft, at the completion of which, arm 54' on the shaft 4| engages the clutch collar 53 and throws out the clutch 62. 'Ihe disengagement of this clutch automatically operates the brake 513 in a manner well known in the art to immediately stop rotation of the shaft 42 and the shaft 4| connected therewith.

It might be here pointed out that the making of a crate or the like in the machine iii involves a succession of three operations each of which is initiated by the operator depressing the foot pedal 'I6 and by the functions of the machine which automatically result therefrom. In the first of these operations a side comprising three separate slats S is nailed to corresponding edges of the two crate heads H. The second of these operations nails a bottom to the crate heads which bottom comprises four separate slats. The third operation nails a second side to the crate heads, which side comprises three separate slats.

The nail feed mechanisms |43 operate in a manner well known in the art to feed nails selectively to the groups |25, |27, |28 and |29 of nail chucks |30 so that when the machine is at rest prior to commencing each of the operations ,Y |30 have previously been furnished for nailing a side on to thecrate, nails are contained only in the chucks |50 in the groups |25, |27 and |28 thereof, and so that just prior to the operation in which a bottom is nailed to the crate, nails are provided in all of the chucks i353. The reason for this is that the slat conveyor 255 prior to each of the side nailing operations feeds three slats S into position just beneath the groups of chucks |25, |21 and |28, as shown in Fig. 5, and in the nailing operation which immediately follow nails are driven from the chucks |55 in these groups through these three slats and into the crate heads H disposed therebeneath.

Just before the operation of machine i5 in which a four slat bottom is applied to the crate, however, the slat feed mechanism 205 feeds four slats S into position to be nailed to the crate heads, the foremost three of these'slats being then located exactly as the three slats S shownl in Fig. 5 and the fourth slat being located with its ends directly beneath the groups |29 of chucks |30. These four slats are, of course, fed into place by the dogs 2|4 of the group 2|2 thereof provided on the chains 2&0. It is thus seen that when four slats are to be nailed to the crate heads in a given nailing operation the kgroups |29 of chucks |30 are previously supplied with nails by the nail feed mechanism |43 but when only three slats are to be nailed to the crate head, only the groups |26, |27 and |28 of chucks with nails by the nail feed mechanisms.

Referring now to. the initial single revolution of the shaft 4|, which was effected in the manner described hereinabove, it is noted that this performs the following functions. Being fixed to the shaft, the cams 5| and 53 rotate therewith in the direction of the arrow 235 in Fig. 6, causing the rollers |58 to ride downwardly from the upper cam surfaces of the cams 5| onto the lower cam surfaces thereof thus lowering the slat conveyor As the ends of the three slats S come to restA on the crate heads with the designated groups of nail chucks resting on top of the slat ends, the nail driver crossheads are drawn downwardly by the cranks 55 and pitmans |50 causing the individual nail drivers |36 to slide downwardly in the nail chucks |30 whereby the nails previously delivered to those groups of these chucks which rest on the slats S are driven downwardly through these slats into the crate heads, the consumation of the nail driving movement being illustrated in Fig. 6.

During the latter half of the initial single revolution of the shaft 4|, the results of which are here being described, the nail driver crossheads |35, the chuck crossheads |25 and the slat conveyor 22D are all returned to their uppermost positions in which they are shown in Fig. 5. Just as the shaft 4| is completing this single revolution, the cam 53 thereon engages the cam follower roller 'i5 on the arm i3 and depresses this arm to rock the shaft M and swing the arm 80 out from beneath the clutch control nger 3|, thereby causing the clutch 55 to be thrown into engagement.

This commences the single revolution of the shaft G3 which, through the drive sprocket 68 and the chain 225, rotates the shaft 264 of the conveyor 20B and causes the chains 2| Ei to travel about the sprockets 208 of the conveyor. This moves the dogs 2M of the group 2 i against those three slats S which have just been nailed to the crate heads H and expel the partially completed vwork from the machine in the manner shown in Fig. 7. At the same time the group 2|2 of dogs 2id, of which there are four on each of the chains Elli, comes successively into engagement with slats S in the bottom of magazine |11 so as to feed a group of four slats from this magazine whereby, at termination of'` the single revolution of the shaft 43 which causes the traveling of the chains 2|, the firstthree of these four slats will be disposed exactly as the three slats S shown in Fig. 5, while the fourth. Slat of the new group of four will be disposed with its ends directly be neath the groups |29 of nail chucks |35.

As soon' as the unfinished work comprising crate heads H with the first side of three slats nailed thereto has been ejected from the machine iii by the slat conveyor 255, as shown in Fig. '7,

the operator seizes the unfinished work in his hands and turns it 90 degrees so that the slats lof the first side are disposed towards him and the long edges of the crate heads are disposed horizontally. Whereupon he pushes the crate heads H back into the machine against stops Vil with the upwardly disposed rails i023 of the heads resting on the nailing anvils 9i.

When the operator has completed this repositicning of the work and the slat feed conveyor 255 has finished feeding four slats into position as hereinabove described the operator again steps on the pedal l5. This results in the lowering of the slat conveyor 255, the nail chuck crossheads |25 and the nail driver crossheads |35 to de Cil (lil

Aation the unfinished work is again ejectedfby the automatic traveling ofthe` chains 2|0 as the lattermove'to feed three new slats into place for applying the second side to the crate.' The unfinished work when thus ejected into the hands of the operator is again rotated by him, 90 .degrees and reinserted into the machine against the stops |10 in position for receiving the second side. 'Ihe operator then steps on the pedal 10 a third time, which results, lin the same manner as above described, in the nailing of the `second side of three slats onto the crate heads H, thus completing the crate, which is ejected at the completion of these nailing operations by the chains 2|0 moving to feed three new slats S into place, as shown in Fig. 5 in readiness for the starting of the manufacture of another crate.

As the pitmans move downwardly during each nail driving operation the bolt |52 provided in the left-hand pitman |50 swings the arm |20 downwardly, and rocks the hub H9 thereof relative to the member IIB, causing a left-hand shifting of the shaft |01. This shifts the usher ||5 against the crate head H inserted inthe left-hand side of the machine to hold this head flush against'the head stop |09. At the same time this` left-hand shifting of the shaft |01 carries with it the crate head stop H0 on the right-hand side of the machine so as to cause the stationary flusher right-hand crate head flush against the stop I|0, this left-hand movement of the latter bringing the stops |09 and ||0 into a precisely spaced relationshipwhich by virtue of the crate heads now being forced thereagainst results in crates being manufactured having a definite predetermined length..

Upon the return upward of the bolt |52 with the pitman |50 to which it isattached the arm |20 and hub member IIS swing backward to the positions in which they are shown in Fig. 8, thus shifting the shaft |01 to the right and releasing the crate heads from compression between the head stops |00 and ||0 and the flushers ||5 and c With each revolution of the shaft 43 the gear 12 kis rotated by Vvirtue of its meshing with pinion 61 and this rotates the shaft 45 through the gears 13 and 14 and causes the crank 15 to reciprocate the pitman |65 which, through the lever |63 and link |64 and tie rod |42, accomplishes the rocking of the nail hoppers |40 and I 4| to keep a constant supply of nails accessible to the nail feed mechanisms |43.

I hereby claim:

1. In a nailing machine the combination of: nailing mechanism; anvil means for supporting a pair of box heads in spaced relation in each of three positions to permit sai'dnailing mechanism to securethereto consecutively a rst side, a bottom and a second side; means for feeding a series of independent slats into the proper places ksaid heads in the next succeeding nailing' operation. 2. A combination as inf-claim l in which Said H6 to press the.

Aslat` feeding means expels the work from itsnailing position in the machine immediately following each nailing operation. A v 3.-In a vsemi-automatic nailing machinevthe combinationrof.: nailing mechanism.; anvil means. for supporting a pair of 'box heads in spacedA relation successively in three positions to permit the operation of said nailing mechanism in securing .to said heads consecutively a first side, a

bottom and a second side; means for feeding box material into proper place krelative to said box heads when the latter are in each of theaforesaid three positions lin order for said box material to be nailed to said box heads kto form'said sides and bottom; and means automatically operable in timely relation with said' nailing mechanism to cause said box heads to be expelled from each of their positions as aforesaid on said anvil means following the nailingof a side or bottom to said heads while the latter are so positioned,v

material to be nailed to three pairs of edges of said heads to form the sides and bottom of a box; and endless chain-means operable in timely relation with said nailing mechanism to expell said heads from nailing position on said anvil-means and to feed new box material into place tofbe nailed to said box heads when the latter are repositioned on said anvil means by the operatori V5. In a nailing machine the combination of: nailing mechanism; anvil means for supporting a -pair' of box heads in spaced relation in each of three positions to permit said nailing mechanism" to secure thereto consecutively a rst side, ya

bottom and a secondside; anendless chain conpair of box heads in spaced. relation 'in each of three positions to permit said nailing'mechan'ism to secure thereto consecutively a rst sid'e, a

bottom and a second side; an endless chain' conveyor for feeding a series of independent slats into theproper places tobe nailed to said heads,`

with the latter inyeach of the aforesaid three positions, to form saidsides and bottomv onsaid heads, a plurality of said slats being fed by said conveyor for the formation 'of each of said sides` andbottom, a different number'of said slatsy being fed for the formation of said bottom ythan are fedfor the formation of each of said sides;` and means for operating said conveyorr tocause the same to perform its functions aforesaid in timely relation with' the operation of said nailing '7.` A combination as in claim 4 in which said new box material when first fed .into 'said' machine by said endless chain means is disposed a substantial distance above said anvil'means to allow ample room for the operator to manipulate the box heads into their new positions on said anvil means.

8. A combination as in claim 4 in which said new box material when first fed into saidmachine by said endless chain means is disposed a substantial distance above said anvil means to allow ample room for the operator to manipulate the box heads into their new positions on `said anvil means; and means for automatically lowering said endless chain means to bring said new box material into contact with said box heads prior to the vfunctioning of said nailing mechanism to nail said box material to said` box heads.

9. In a nailing machine the combination of a nailing mechanism; anvil means for supporting a pair of box heads in spaced relation in each of three positions to permit said nailing mechanism to secure thereto consecutiveh7 a iirst side, a bottom, and a second side; endless chain means for feeding box material into place between said nailing mechanism and said box heads to form one of said sidesor bottom; and means for shifting said endless chain means vertically7 in timed relation with the operation of said nailing mechanism to prevent said new box material, when fed into vsaid machine, from interfering with the change of said box heads from one of the aforesaidpositions thereof to a subsequent one of said positions.

10. In a nailing machine the combination of: a nailing mechanism; anvil means for supporting a pair of box heads in spaced relation in each of three positions to permit said nailing mechanism to secure thereto consecutively a first side, a bottom, and a second side; endless chain means for feeding box material into place between said nailing mechanism and said box heads to form one of said sides or bottom; and means for reciprocating said endless chain means vertically in timely relation with the operation of said nailing 'mechanism to prevent said new box material,

when fed into said machine, from interfering with the change of said box heads from one of the aforesaid positions thereof to a subsequent one of said positions and to cause said endless chain means to place said new box material in contact with said box heads prior to the nailing of said new box material to said box heads.

11. In a nailing machine the combination of: a nailing mechanism; a slat magazine; an endless chain conveyor; dogs on said conveyor for stripping slats from said magazine; anvils for supporting box heads in spaced relation beneath said nailing mechanism;,and means for actuating said conveyor in timely relation with said nailing mechanism to stripslats from said magazine and deliver said slats into proper positions to be nailed to heads resting on said anvils.

12. In a nailing machine the combination of: a nailing mechanism; a slat magazine; an endless chain conveyor; dogs on said conveyor for stripping slats from said magazine; anvils for supportingrbox heads in spaced relation beneath said nailing mechanism; means for actuating said conveyor to strip slats from said magazine and deliver said slats into proper positions to .be nailed to heads resting on said anvils; and means for engaging said slats on said conveyor and restraining said slats against disarrangement until just before the nailing operation takes place in which said nailing mechanism nails said slats to said heads.

13. In a nailing machine the combination of: a slat magazine; an endless chain conveyor; dogs on said conveyor for stripping slats from said magazine and conveying slats to a nailing position; anvil means for supporting spaced box heads beneath said position; means causing relative vertical movement between said anvil means and said conveyor to cause said slats to be deposited on box heads supported on said anvil means; and a nailing mechanism for nailing said slats to said box heads when said slats are thus deposited on said box heads.

14. In a nailing machine the combination of: a slat magazine; an endless chain conveyor; dogs on said oconveyor for stripping slats from said magazine and conveying slats to a nailing position; anvil means for supporting spaced box heads beneath said position; means causing relative vertical movement between said anvil means and said conveyor to cause said slats to bedeposited on box heads supported on said anvil means; a nailing mechanism for nailing said slats to said box heads when said slats are thus f deposited on said box heads; and means for causing said conveyor to stop feeding said slats when the latter arrive in said nailing position and causing said conveyor to start up again after said nailing operation so as to expel the work from nailing position.

15. In a fastener inserting machine, the combination of: a fastener inserting mechanism; anvil means for supporting work including end members and transverse members, while being operated on by said mechanism; a magazine for holding said transverse members; an endless chain conveyor; dogs on said conveyor for stript ping transverse members from said magazine; and means for actuating said conveyor in timely relation with said fastener inserting mechanism to strip transverse members from said magazine and deliver said members into proper p0- sition to be fastened to said end members by said lmechanism while the work is resting on said anvil means.

16. In a fastener inserting machine, the combination of a fastener inserting mechanism; anvil means for supporting work including end members an-d transverse members, while being operated on by said mechanism; a magazine for holding said transverse members; an endless chain conveyor; dogs on said conveyor for stripping transverse members from said magazine; and means for actuating said conveyor in timely relation with said fastener inserting mechanism to strip transverse members from said magazine and deliver said members into proper position to be fastened to said end members by said mechanism while the work is resting on said anvil means, said chain conveyor operating upon the conclusion of the operation of said mechanism on said work, to expel said work from said machine.

17. In a fastener inserting machine, the combination of: a fastener inserting mechanism; anvil means for supporting work including end members and transverse members, while being operated on by said mechanism; a magazine for holding said transverse members; an endless chain conveyor; dogs on said conveyor for stripping transverse. members from said magazine; means for actuating said conveyor in timely relation with said fastener inserting mechanism to strip transverse members from said magazine and deliver said members into proper position to be fastened to said end members by said mechanism while the work is resting on said anvil means; and means producing relative vertical movement between said chain conveyor and said anvil means, said movement locating said Work in operative relation with said anvil means at thev beginning of the operation of said fastener inserting mechanism. l

18. In a fastener inserting machine, the combination of: a fastener inserting mechanism; anvil means for supporting work including end members and transverse members, while being operated on by said mechanism; a magazine for holding said transverse members;

ping transverse members from said magazine; means for actuating said conveyor in timely relation with said fastener inserting mechanism tostrip transverse members from said magazine an endless 'l chain conveyor; dogs on said conveyor forstripand deliver said members into proper position to be fastened to said end members by said mechanism While the Work is resting on said anvil means; and means producing relative vertical movement between said chain conveyor and said anvil means, said movement locating said Work in operative relation with said anvil means at the beginning of the operation of said fastener inserting mechanism, said relative vertical movevment also removing said Work from engagement with said anvil means at the completion of the operation of said fastener inserting mechanism, said chain conveyor then automatically expelling the Work from operative relation with said mechanism.

HERBERT E.l TWOMLEY. 

